Covalent organic frameworks catalyzed by organic Lewis acid  

作　　者：Xiangqian Shi Lezhi Yi Hexiang Deng 

机构地区：[1]College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China [2]Hubei Yangtze Memory Laboratories,Wuhan 430205,China [3]Key Laboratory of Biomedical Polymers-Ministry of Education,College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China

出　　处：《Science China Chemistry》2022年第7期1315-1320,共6页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22025106,21971199);the National Key Research and Development Project(2018YFA0704000);the Innovation Team of Wuhan University(2042017kf0232)。

摘　　要：We report the synthesis of covalent organic framework(COF)crystals with organic Lewis acid instead of the conventional use of Br?nsted acid or inorganic Lewis acid.Specifically,tris(pentafluorophenyl)borane was applied for the growth of seven imine COFs:TAPB-PDA-,TAPB-2,5-DMTA-,TAPB-2,3-DMTA-,TAPT-PDA-,TAPT-2,5-DMTA-,TAPT-2,3-DMTA-COF with hcb topology and varied in functional groups,as well as a new one,COF-820,with sql topology.All these COFs were obtained at room temperature.Their high crystallinity and porosity demonstrate the versatility of the organic Lewis acid as a catalyst.Bulky organic Lewis acid was found critical for the production of COF-820,while its absence resulted in the formation of a different COF,4PE-1P-COF,with kgm topology using the same building blocks.Such steric effect,typical for organic catalysts,provides a new way to regulate the topology of COFs and their future design.

关 键 词：covalent organic framework organic lewis acid tris(pentafluorophenyl)borane topology regulation 

分 类 号：TB34[一般工业技术—材料科学与工程] O643.36[理学—物理化学]